Expression.TypeIs(Expression, Type) Method
Definition
Important
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Creates a TypeBinaryExpression.
public:
static System::Linq::Expressions::TypeBinaryExpression ^ TypeIs(System::Linq::Expressions::Expression ^ expression, Type ^ type);public static System.Linq.Expressions.TypeBinaryExpression TypeIs (System.Linq.Expressions.Expression expression, Type type);static member TypeIs : System.Linq.Expressions.Expression * Type -> System.Linq.Expressions.TypeBinaryExpressionPublic Shared Function TypeIs (expression As Expression, type As Type) As TypeBinaryExpressionParameters
- expression
- Expression
An Expression to set the Expression property equal to.
- type
- Type
A Type to set the TypeOperand property equal to.
Returns
A TypeBinaryExpression for which the NodeType property is equal to TypeIs and for which the Expression and TypeOperand properties are set to the specified values.
Exceptions
expression or type is null.
Examples
The following example demonstrates how to use the TypeIs(Expression, Type) method to create a TypeBinaryExpression that represents a type test of a string value against the Int32 type.
// Create a TypeBinaryExpression that represents a
// type test of the string "spruce" against the 'int' type.
System.Linq.Expressions.TypeBinaryExpression typeBinaryExpression =
System.Linq.Expressions.Expression.TypeIs(
System.Linq.Expressions.Expression.Constant("spruce"),
typeof(int));
Console.WriteLine(typeBinaryExpression.ToString());
// This code produces the following output:
//
// ("spruce" Is Int32)
' Create a TypeBinaryExpression that represents a
' type test of the String "spruce" against the Int32 type.
Dim typeBinaryExpression As System.Linq.Expressions.TypeBinaryExpression = _
System.Linq.Expressions.Expression.TypeIs( _
System.Linq.Expressions.Expression.Constant("spruce"), _
Type.GetType("System.Int32"))
Console.WriteLine(typeBinaryExpression.ToString())
' This code produces the following output:
'
' ("spruce" Is Int32)
Remarks
The Type property of the resulting UnaryExpression represents Boolean.
